Improvement in coal-oil lamps



. UNrrnfD; STATES' 1MENTA Ormai AnsonT H. rLArr, or YELLowsrmNGs, onto@l IMPROVEMENT IN COAL-OIL LAMPS.`

Specification forming part of Letters Patent No. 47,1151, dated April25, 1865.

To all whom it may concern:

Beit known that I, A. H. BLATT, of Yellow Springs, in the county ofGreene and State of Ohio, have invented an Improved Coal-Oil-LampBurner; and I do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawings,making part of this specification. y

Figure 1 is a side elevation of my improved lamp-burner; Fig. 2, acentral vertical section thereof in a pla-ne at right angles to theplane of view in Fig. 1.

Like letters designate corresponding parts in both figures.

My improvements have special adaptation to the purpose of using a veryshort chimney, F, so as to make a practically portable coal-oil lamp andI use in this invention a flat wick.

lhe leading desiderata in this case are: An abundant supply of air tosupport the combustion; the thorough breaking up, mixing, andequalization of the draft-currents, and an increased surface of contactin the immediate act of striking the combustible gases, whereby theflame is produced.

The draftair is first admitted beneath the lower edge of a bell-shapedor flaring burnerbase, A, (like an inverted-funnel mouth,) whichsurrounds the upper part of the lampbody at a sufcient distancetherefrom to afford the requisite annular space for the purpose. Thisopen base rapidly diminishes in diameter upward substantially as shownin the drawings, so that while it admits a full and free supply of airit rapidly concentrates it within. From the summit of this open base abasilar nely-perforated partition, B, Fig. 2, extends convexly downwardand terminates in the screw portion h', by which the burner is securedto the lamp-body. The form and position of this `perforated partition inrelation to the open base A are such that in a great measure they changethe direction of the ascending currents of air and turn them inwardtoward a common center in a direction more nearly approaching thehorizontal. The effect of this is not only to break up the currentscoming in on diii'erent sides, but to commingle and equalize themwithin.

The top of the commingling-chamber in-` closed by the basilar partitionB is covered by a perforated cap, C, also convex downward, but in a muchless degree than the basilar partition B. But the convexity or upwardconcavity is sufficient to direct the air not only upward but inwardtoward the flame of the burner, thereby both changing the direction ofand dividing the currents again, and causing them to inipinge moredirectly upon the sides of the dame. But, in

addition to this arrangement of the perforated partitions below theflame to accomplish the results aimed at, the burner-cap D is Varied inconstruction in relation to the wick-tube G. This improvement consistsin having the flame-opening 0l therein deeper than usual at the lowerends or corners, which are nearly or exactly on a level with the top ofthe wick-tube, as shown at m in Fig. 2. This arrangement allows theiiame to spread edgewise much more than usual, thereby furnishing moresurface to combustible gases as festas generated and presenting abroader whiter flame. The result ofthese improvements is as set forth atiirst above, the chimney required for perfect combustion not exceedingthe size indicated in the drawings. n

For greater convenience in trimming the lamp the chimney and burner capholder H are removable from the lower part of the burner by fitting saidlower part and securing it thereto by a bayonet fastening, a b, as shownin Fig. 1, or the equivalent thereof'. With this improvement theburnercap is attached permanently to the holder H. The chimney F` isattached thereto by my improved spring sliding fastener c, as describedin a previous application for Letters Patent. l y

I also use my improved laterally-movable wick-regulator I, as describedin my former application, being here applied to a single wick-tube,instead of two, as in that case.

rIhe slot g, in which the free end of the regulator-shat't t' moves,lines in Fig. 2. r What I claim as my invention, and desire to secure byLetters Patent, is-m 1. The combination of the downwardlyis indicated bydotted supply oxygen to the over the upper portion of convex perforatedbasilar partition B and the and deep flame-opening d, arranged andopperforated cap G, having a degreevof eonerating together substantiallyas and for the vexty downward less than the former, subpurpose hereinset forth.

stantially as and for the purpose herein specil ANSON H. PLATT. ed.Witnesses:

2. The combination of the Haring open base M. W. PLATT,

A, perforated partition B, perforated cap C, C. L. PLATT.

